How To Unlock AT&T iPhone 4S GSM Only To Work With T-Mobile Without Jailbreak

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Reportedly, a strange bug is allowing users to unlock GSM iPhone 4S on iOS 5 without jailbreaking it first. Unlocking is a process of process of breaking the restrictions put by your current carrier and using your device with a network carrier of your own choice.

Unlock iPhone 4S (GSM) From AT&T To T-Mobile

Make sure WiFi is off ( also tap on ‘Forget this Network” to make sure it doesn’t connect automatically later)

Switch off Airplane Mode and iPhone will search for network. This is followed by the Apple splash screen appearing.

Activation Required will be displayed on the screen

EDGE network will activate automatically – notice the ‘E’ on the top left corner of the screen

Wait for about 20-30 seconds and turn off the phone

Turn on iPhone and the same Activation Required screen will be displayed

When you see one signal bar, tap on Use Cellular Connection

Eject SIM card

Activation Required screen will be displayed the second time

Insert SIM card

Unlocked!

You also need to try to repeat the process a couple of time if it does not work for you the very first time. We have not received any confirmation whether it can be used on networks other than T-Mobile after unlocking. You can also see the video in which this process is performed:

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